So, after the first race change option happened a while back, if someone was a race with a high chance of the force, and they change to something with a lower percent, would they keep the regular percent, or would it go lower and re-roll?
I am wondering, because when it was available, I changed to Squib from Selkath. The Selkath have a 4% but the Squib have 2%. So did I keep the 4, or did it go down to 2?

And just to provide an answer to the follow-up question I had when inquiring about this very same thing, if your character already was FS but was simply unaware of it (ie you hadn't gotten tested and revealed since a server check at 1, 6, 11, 16, etc. as Maha described) the race change did not reverse or re-roll that "success".